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If the average price for a loaf of bread was $2.90 in 2007 and $2.70 in 2009, then the change in this basic item of

If the average price for a loaf of bread was $2.90 in 2007 and $2.70 in 2009, then the change in this basic item of food would be -$0.20. The negative sign tells us that the price of bread has decreased over this two-year period. Question 23 How much did the average price of a loaf of bread decreased by per year? cents per year

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